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Proceedings 2017, 1(4), 376; doi:10.3390/proceedings1040376

Wall Shear Stress Calorimetric Micro-Sensor Designed for Flow Separation Detection and Active Flow Control

1
University Lille, CNRS, Centrale Lille, ISEN, University Valenciennes, UMR 8520—IEMN, LIA LICS/LEMAC, Lille, France
2
Office National d'Etudes et de Recherches Aerospatiales, Chemin de la Hunière, 91123 Palaiseau, France
3
Fluiditech, Thurmelec, 68840 Pulversheim, France
Presented at the Eurosensors 2017 Conference, Paris, France, 3–6 September 2017.
*
Author to whom correspondence should be addressed.
Published: 9 August 2017
Download PDF [612 KB, uploaded 13 October 2017]

Abstract

This paper presents an efficient and high-sensitive micro-sensor designed for wall shear stress measurement. The main technical application targeted is flow separation detection for closed-loop active flow control. The sensor is a temperature-resistance transducer operating on heat transfer. The device is micro-structured with three substrate-free wires presenting a high aspect ratio, and periodic perpendicular micro-bridges ensuring mechanical toughness and thermal insulation. This design achieves a homogeneous temperature distribution along the wires. Welded on a flexible printed circuit, the sensor is wall-mounted on a wind tunnel. The experiments, conducted in both attached and separated flow configurations, demonstrate the sensor sensitivity to wall shear stress up to 2.4 Pa and the ability of the 3-wires based design to perform flow direction sensing for back-flow detection.
Keywords: MEMS sensors; wall shear stress sensors; calorimetric sensors; flow control; separation detection MEMS sensors; wall shear stress sensors; calorimetric sensors; flow control; separation detection
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Ghouila-Houri, C.; Gallas, Q.; Garnier, E.; Merlen, A.; Viard, R.; Talbi, A.; Pernod, P. Wall Shear Stress Calorimetric Micro-Sensor Designed for Flow Separation Detection and Active Flow Control. Proceedings 2017, 1, 376.

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